Welcome
Username or Email:

Password:


Missing Code




[ ]
[ ]
Online
  • Guests: 32
  • Members: 0
  • Newest Member: omjtest
  • Most ever online: 396
    Guests: 396, Members: 0 on 12 Jan : 12:51
Members Birthdays:
One birthday today, congrats!
Bfeigum (35)


Next birthdays
07/12 genious 7 (32)
07/13 Friday (55)
07/13 robismor (30)
Contact
If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.


Special Thanks To:
  • Aaron Holmes
  • Aaron Wheeler
  • Adam Horden
  • Alan Scrimgeour
  • Andre
  • Andrew Haynes
  • Anonymous000
  • asabase
  • Austin Weil
  • barney
  • Barry
  • Bert Hickman
  • Bill Kukowski
  • Blitzorn
  • Brandon Paradelas
  • Bruce Bowling
  • BubeeMike
  • Byong Park
  • Cesiumsponge
  • Chris F.
  • Chris Hooper
  • Corey Worthington
  • Derek Woodroffe
  • Dalus
  • Dan Strother
  • Daniel Davis
  • Daniel Uhrenholt
  • datasheetarchive
  • Dave Billington
  • Dave Marshall
  • David F.
  • Dennis Rogers
  • drelectrix
  • Dr. John Gudenas
  • Dr. Spark
  • E.TexasTesla
  • eastvoltresearch
  • Eirik Taylor
  • Erik Dyakov
  • Erlend^SE
  • Finn Hammer
  • Firebug24k
  • GalliumMan
  • Gary Peterson
  • George Slade
  • GhostNull
  • Gordon Mcknight
  • Graham Armitage
  • Grant
  • GreySoul
  • Henry H
  • IamSmooth
  • In memory of Leo Powning
  • Jacob Cash
  • James Howells
  • James Pawson
  • Jeff Greenfield
  • Jeff Thomas
  • Jesse Frost
  • Jim Mitchell
  • jlr134
  • Joe Mastroianni
  • John Forcina
  • John Oberg
  • John Willcutt
  • Jon Newcomb
  • klugesmith
  • Leslie Wright
  • Lutz Hoffman
  • Mads Barnkob
  • Martin King
  • Mats Karlsson
  • Matt Gibson
  • Matthew Guidry
  • mbd
  • Michael D'Angelo
  • Mikkel
  • mileswaldron
  • mister_rf
  • Neil Foster
  • Nick de Smith
  • Nick Soroka
  • nicklenorp
  • Nik
  • Norman Stanley
  • Patrick Coleman
  • Paul Brodie
  • Paul Jordan
  • Paul Montgomery
  • Ped
  • Peter Krogen
  • Peter Terren
  • PhilGood
  • Richard Feldman
  • Robert Bush
  • Royce Bailey
  • Scott Fusare
  • Scott Newman
  • smiffy
  • Stella
  • Steven Busic
  • Steve Conner
  • Steve Jones
  • Steve Ward
  • Sulaiman
  • Thomas Coyle
  • Thomas A. Wallace
  • Thomas W
  • Timo
  • Torch
  • Ulf Jonsson
  • vasil
  • Vaxian
  • vladi mazzilli
  • wastehl
  • Weston
  • William Kim
  • William N.
  • William Stehl
  • Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Forums
4hv.org :: Forums :: Electromagnetic Radiation
« Previous topic | Next topic »   

Add your laser fail here...

1 2 
Move Thread LAN_403
Conundrum
Sat Mar 05 2011, 09:31PM Print
Conundrum Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Hi all.
Just found this really nice photo on laserpointerforums.

Seems that someone was a bit careless when decanning a diode (looks like a 405, possibly a 445 frown )

Had that happen to me once with a 940? nm cd write laser. In this case the actual semiconductor came apart into two halves!
can sometimes happen with overdriven PS3 diodes as well.

Feel free to add to this thread with pics of laser related oopses.

EDIT:- I've had diodes die due to overheating before, in my case it was a £40+ decanned HD-DVD drive laser.
Ran it in an aixiz but evidently the heat buildup at 72mA caused it to run away and cook.
Module was at about 70C (hot to the touch) when it COD'd.

-A
1299360701 96 FT0 Laser Fail
Back to top
Adam Munich
Sat Mar 05 2011, 11:51PM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
Traded tritium for a 445 diode, got it in the mail and blew it up all of 10 minutes later.

That is why I don't build diode lasers...
Back to top
haxor5354
Sun Mar 06 2011, 01:53AM
haxor5354 Registered Member #2063 Joined: Sat Apr 04 2009, 03:16PM
Location: Toronto
Posts: 352
Grenadier wrote ...

Traded tritium for a 445 diode, got it in the mail and blew it up all of 10 minutes later.

That is why I don't build diode lasers...

NEVER power up a laser diode without a driver. laser diodes run on current, but sometimes you can't have the current without raising the voltage and if you raise the voltage, the current might get too high and deep fry your diode. drivers are suppose to limit the current and protect your diode.

how mant watts was the diode that you traded for? If anything lower than 1000mW I'd rather keep the tritium. atleast they ligh up for 10 years right? and they're cool to have too, how often do you radioactive material aroud?
Back to top
Adam Munich
Sun Mar 06 2011, 01:58AM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
Heh, I used a driver too. It used to be a 1W diode...
Back to top
haxor5354
Sun Mar 06 2011, 02:03AM
haxor5354 Registered Member #2063 Joined: Sat Apr 04 2009, 03:16PM
Location: Toronto
Posts: 352
Grenadier wrote ...

Heh, I used a driver too. It used to be a 1W diode...

didn't heat sink it?
Back to top
Adam Munich
Sun Mar 06 2011, 02:05AM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
Diode died instantly, no heat to be found. My driver must've been dead or something.

Meh, nothing I can do now anyways.
Back to top
dmg
Sun Mar 06 2011, 04:31AM
dmg Registered Member #2628 Joined: Fri Jan 15 2010, 12:23AM
Location:
Posts: 627
Grenadier wrote ...

Diode died instantly, no heat to be found. My driver must've been dead or something.

Meh, nothing I can do now anyways.


So did you use a heatsink or you didnt?
What kind of driver did you use for the diode?

btw, the 445 diodes, the A-140/150 series of them can do 2W with good heatsinking.
The A-130's (now discontinued I hear) have a slightly lower wavelenth, and are less efficient so they have a lower output.
Remember.. heatsinks are your friends...

Sinksareyourfriends

Sinkfront
Back to top
Meatball
Sun Mar 06 2011, 05:00AM
Meatball Registered Member #2401 Joined: Mon Sept 28 2009, 04:25PM
Location:
Posts: 74
I've had 445s die on me on first or second power up for no reason at all. Fickle the diode laser is. Very fickle indeed.
Back to top
IamSmooth
Sun Mar 06 2011, 07:24AM
IamSmooth Registered Member #190 Joined: Fri Feb 17 2006, 12:00AM
Location:
Posts: 1567
How powerful of a diode can one get for a laser that can do some serious burning?
Back to top
Conundrum
Sun Mar 06 2011, 11:26AM
Conundrum Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
3W 808's are fairly common now, see Link2

I believe that 10W blue are in the pipeline as the blue-green conversion is more efficient than 808-1064-green so they have dual application as projector light sources and general purpose spot lighting.

I also discovered something interesting, lasers can be used to make pretty good ready polarised illuminators for microscope+webcam applications.
(DO NOT USE with conventional microscopes!!!!)

Also another amusing application is to couple a red or blue write diode to an optical fibre bundle and make a high efficiency backlight for LCD use.

-A
Back to top
1 2 

Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob

Go to:

Powered by e107 Forum System
 
Legal Information
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.